#include <stdio.h>
int main()
{
    char c = 'A';
    printf("%c and %d\n",c,c);
    printf("char字符运算: %c",c-32);

    char zero = '0'; 
    printf("%c\n", zero);
    printf("%d\n", zero);

    printf("%d\n", sizeof(c));
    printf("%d\n", sizeof('c'));

    printf("%c\n", '\71'); // 八进制  转义字符
    
    printf("%c and %c and %c\n", '\18', '\71', '\107');

    printf("%c\n", '\102');  // 八进制
    printf("%c\n", '\x42');  // 十六进制
    

}